Improvement in machines for cutting wood gears



UNITED STATES PATENT OFFICE.

JAMES JACKSON, OF VVOONSOCKET, RHODE ISLAND.

IMPROVEMENT IN MACHINES FOR CUTTING WOOD GEARS.

Speeication forming part of Letters Patent No. 51,458, dated December l2, 1865.

To all whom it may concern Be it known that I, JAMES JACKSON, of Woonsocket, in the county of Providence and State ot Rhode Island, have invented a new and Improved Machine for Cutting` Mortise- Teeth for Bevel-Gears; and I do hereby declare that the followingis afull, clear, and exact depertaining to the same; Fig. 3, Sheet No. 2, a

side sectional view ot the same, taken in the line y y, Fig. l; Fig. 4, a transverse vertical section ofthe same, taken in the line z z, Fig. 3.

Similar letters ot reference indicate corresponding parts.

This invention relates to a new and improved machine for cutting wooden teeth for bevel-gears, whereby the work may be done in an expeditious and perfect lnanner, and machine adapted for cutting teeth to suit wheels of dii'erent diameters.

A represents a i'ramin g constructed of rectangular or other suitable form, and having a sliding cross-bar, B, placed transversely in its lower part, with a vertical bar, C, attached, the upper part of said bar having a screw, a, on which a thumb-nut, D, is fitted, the upper part of the bar passing through a slot, l), made longitudinally in a bar, E, which is placed longitudinally in the upper part of the franr ing. This vertical bar C has two arms, c c, projecting horizontally from it, between which the blocks F, from which the teeth are cut, are clamped one at a time.

G G represent two arms, which are connected at one end by a pivot, d, in a horizontal bar, H, in one end of the framing A, said bar being allowed to slide freely up and down in the framing, and adjusted higher or lower by means ot' screw-rods I I. The opposite or free or disengaged ends of the arms G G are connected by a cord, J, having a weight, K, attached and applied in such a manner that the weight will have a tendency to draw the arms toward each other. The arms G G have each a slide, L, itted on them, and these slides are connected by clamps M to reciprocating rods N, which are operated by a crank-shaft, O, and pitman P at one end of the framing, the arms G serving as guides for the slides. The slides L have each a plate, Q, attached, and these plates are made to bear, by means of the weight K, against the sides of a pattern, R, fitted vertically to the bar O. This pattern is shown clearly in Fig. 2, and it corresponds to the form ot' the teeth to be cut. The slides L have each a vertical shaft fitted in them, with a circular cutter, S, on their lower ends, and on the upper ends of these shafts there are pulleys e, around which and pulleys f on the slides, pulleysg on the arms, and a pulley, h, on the framing a belt, T, passes. (See Fig. 1.) By this arrangement ot' the pulleys and belt a rotary motion is communicated to the cutters S, while they are allowed to work with a reciprocating motion.

The free or disengaged ends of the arms G G rest on a horizontal bar, U, in the framing, which may be adjusted higher or lower by means of screw-rods V V.

From the above description it will be seen that the tooth will be cut from the block F ot' a form corresponding to the pattern R.

By adjusting the bar H higher or lower and the vertical bar C nearer to or farther from the bar H, the device may be adapted for cutting teeth for ditt'erent-sized Wheels.

The whole arrangement is extremely simple and efficient. The cutters are fed to their work from the top of the tooth downward by any suitable mechanism applied to the screwrods V V.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination of the pivoted arms G G, reciprocating slides L, rotary cutters S, and belt T, arranged and operating substantially as and for the purposes specified.

2. The combination of the adjustable bars H U and screw-rods I V with the pivoted arms G G, as and for the purposes set forth.

JAMES JACKSON.

Witnesses CHARLES NoURsE, ANGELO HowLAND. 

